Pocket Ruler & Angle Gauge Keychain

A compact, dual-unit pocket ruler keychain with built-in angle reference for 30°, 45°, 60°, and 90° 🔩 Perfect for quick checks, model making, and workshop work. Designed for makers, engineers, and DIY fans who love practical tools that fit in your pocket. ✅ Dual scale: centimeters & inches (5 cm / 2 in) ✅ Angle gauge: 30°, 45°, 60°, 90° for instant angle checks ✅ Fast & precise print: works with 0.2 mm or 0.4 mm nozzle ✅ Color change guide: – Nozzle 0.2 mm @ 0.1 mm layer height → change color on layer 21 – Nozzle 0.4 mm @ 0.2 mm layer height → change color on layer 11 ✅ Print with AMS or manual pause – easy filament switch 🎨 Small, stylish, and super useful – a perfect everyday keychain for every maker 🛠️